Test 2 Formulas Flashcards
1
Q
Molarity
A
Molarity= moles of solute (mol)/ Volume of solution (L) c= n/V
2
Q
Finding moles with molarity and volume
A
Moles= molarity * Volume n= c * V
3
Q
Change in enthalpy
A
Moles * heat
Ex. Change in heat = 285.8 kJ if 2 moles of water are used.
Enthalpy= 2.00 mol * (285.8 kJ)= 571 kJ
4
Q
Equation of frequency and wavelength
A
Speed of light (m/s)= frequency(1/s) * wavelength (m)
c=vÿ
5
Q
Speed of light
A
Speed of light= 3.00 * 10^8 m/s
6
Q
Energy (J)
A
Energy(J)= Planck’s constant(Js) * frequency (1/s)
E=h * v
7
Q
Planck’s constant
A
Planck’s constant= 6.626 * 10^-34 (Js)
8
Q
Energy of a photon
A
E=hv
E= hc/ÿ
9
Q
Energy of electron
A
E_n= hcR_h/n^2 hcR_h= -2.18 * 10^-18 J n= quantum number
10
Q
Change in energy
A
-2.18 * 10^-18 J ( 1/n2 final - 1/n2 initial)
11
Q
Wavelength associated with electron
A
Ÿ= h/ mass * velocity
12
Q
concentration and volume of solvent to solute.
A
C1 V1 = C2 V2
